small block headers

340srule said

Some will argue that the bigger tube hedman and hookers are better for racing,but i'm running tti's..and very happy with the results,i don't drive my duster nearly as much on the street as i use too,but i can with the tti's,if i was running the bigger tube headers they be getting smashed-up on everything....

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This is good info 340s.

dgc333, this is good info too. This information is covered in detail in the 468 page book "The Design and Tuning of High Performance Engines" by Phillip Hubert Smith. I think the last printing was in 1971. I found it at the library in 1979 and read it cover to cover 3 times by 1982. I paid a lot fines to library, lol! Awesome book and the information still applies 100%.

I would like to see a header dyno test on two separate engine, one a 360 in the 350-400 hp range and another on a 500+ hp stroker. Then I want to see the author of the test install the headers, tell us the ins and outs, then drive 'em on 50 miles of city streets and show before and after pics, lol! I would really like to see what the real life increases on hp and tq really are. Is it 20 hp? 5 hp? Where are the increases in the rpm range, etc?